[Tfug] Really weird query: how do I totally turn off a USB device?

[Jim March]

In other words, let's say Ubuntu appears to be "holding open" a USB device,
in my case a cellular modem as seen here in lsusb:

Bus 004 Device 003: ID 0c88:180a Kyocera Wireless Corp.

I want to be able pass this to a VirtualBox guest OS (WinXP) and have Ubuntu
pretty much not see it or use it at all (so the guest can).  It WILL still
have to be able to see the above because within the VirtualBox control
screen I need to be able to pass that same ID along to the guest OS.  (Yes,
I'm using the VirtualBox "full tilt edition" with USB pass-through support
as opposed to the open-source edition.)

I've told NetworkManager to stop talking to the cellmodem, but that doesn't
appear to be enough to leave it unlocked so the guest OS can get to it.  In
the guest XP machine, the Verizon software can see the cellmodem but can't
power it up.

Help?

Thanks!

Jim
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